Try to tighten and brace your core more. That should help a ton. I’ve noticed that when I front squat, I get way more core engagement in order to brace my spine than during a back squat.

Also, if you’re feeling any kind of fatigue, soreness, or pain in the lower back – the bracing of the core should help a ton as well. I find that I get this effects when squatting and running. Engaging the core always does the trick for me.